Find the Measure of the Third Angle of a Triangle $\mathrm { T }$

Multiple Choice

Find the measure of the third angle of a triangle if the measures of the other two angles are given.
-For what angle $\mathrm { T }$ is $\cos \mathrm { T } \approx 0.423$ ? (Assume $0 ^ { \circ } \leq \mathrm { T } \leq 90 ^ { \circ }$ .)

A) $0.423 ^ { \circ }$
B) $65 ^ { \circ }$
C) $51.917 ^ { \circ }$
D) $25 ^ { \circ }$